Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cc15c66d22a8f7…

MALICIOUS

PDF

72.6 KB Created: 2021-02-11 10:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2adb99d33d84ee02138f2c5cba52ccf9 SHA-1: 6fa1508f432cc59b83a61500bd154153b5b4dce9 SHA-256: 19cc15c66d22a8f7a0a7c0c059b8b7437f686954c0fcec40a8aa0779664f42b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/123?utm_term=kenmore+dishwasher+owner+manual PDF link annotation
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/tedixonuxo-wefunesowuga.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/FCBCidS/splat_color_ball_roller_amaze_color_puzzle_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_5fe85cc75c762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fd2e27537cb3.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/4479988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409093/normal_5fcd99fcea9a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_60210d12b3bbd.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/dGfiajf/garena_authenticator_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_600a924e842cd.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/6gchaid/gokitajunubidajoxumakobox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_601cc2761bf4c.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/cgdgiEq/84720916837.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/5gjoyDG/jefuvasipof.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/cQeqnef/vureviwoteb.pdfIn PDF document text
    • https://bukudemedu.weebly.com/uploads/1/3/1/4/131483547/1eda7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD168 4928 bytes
SHA-256: e9ec90e4ca51f40e66a7449e01198f978a152db9eed3f6f8d234fd8310a2aef5
font_01_sfnt_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 11032 bytes
SHA-256: 258b0d1f5ddb7416447b77c74e8431e213735f395b70d4840bad403b4a086c0c
font_02_sfnt_off00010765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10765 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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